<style lang="less" scoped>
@keyframes wave {
  0%,
  100% {
    transform: rotate(0);
  }
  20%,
  60% {
    transform: rotate(-25deg);
  }
  40%,
  80% {
    transform: rotate(10deg);
  }
}

.corner {
  z-index: 1;
  position: fixed;

  &:hover {
    .octopus-arm {
      animation: wave 480ms ease-in-out;
    }
  }
}

.octopus {
  & {
    top: 0;
    left: 0;
    position: absolute;

    fill: #161b22;
    color: #fff;
    border: 0;

    transform: scale(-1, 1);
  }

  &-arm {
    transform-origin: 130px 106px;
  }
}

@media (max-width: @screen-md) {
  .octopus {
    &-arm {
      animation-timing-function: ease-in-out;
    }
  }

  .corner {
    &:hover {
      .octopus-arm {
        animation: none;
      }
    }
  }
}
</style>

<template>
  <a :href="url" target="_blank" class="corner" aria-label="View source on GitHub">
    <svg :width="space" :height="space" class="octopus" viewBox="0 0 250 250" aria-hidden="true">
      <path :d="outline" class="octopus-fill" />
      <path :d="inline" fill="currentColor" class="octopus-arm" />
      <path :d="octopus" fill="currentColor" class="octopus-body" />
    </svg>
  </a>
</template>

<script>
export default {
  props: {
    url: {
      type: [String],
      default: 'https://vue-scaff.com/',
    },

    space: {
      type: [Number, String],
      default: 100,
    },
  },

  data() {
    return {
      outline: `M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z`,
      inline: `M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2`,
      octopus: `M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z`,
    };
  },
};
</script>
